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    CVE-2026-90776

    Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.

    Published:Sep 13, 2026
    Last Modified:Sep 13, 2026
    EPS:Sep 13, 2026
    EPSS Score:
    CVSS Score:7.5

    Affected Products

    Vendor
    Nodemailer
    Product
    Nodemailer

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-82854 (CVSS 9.3) — Nodemailer before 8.0.4 is vulnerable to SMTP command injection through the unsanitized envelope.size paramete…
    CVE-2026-82853 (CVSS 6.9) — Nodemailer versions before 8.0.5 contain an SMTP command injection vulnerability in the transport name option …
    CVE-2026-82662 (CVSS 8.3) — Nodemailer before 8.0.8 disables TLS certificate verification in lib/fetch/index.js through rejectUnauthorized…
    CVE-2026-82661 (CVSS 5.3) — Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, all…
    CVE-2026-82660 (CVSS 5.3) — Nodemailer before 8.0.9 fails to enforce disableFileAccess and disableUrlAccess options during message normali…
    CVE-2026-82659 (CVSS 7.1) — nodemailer before 9.0.1 fails to apply disableFileAccess and disableUrlAccess flags to message-level raw optio…
    CVE-2024-58379 (CVSS 6.9) — nodemailer before 6.9.9 contains a regular expression denial of service vulnerability in email parsing when at…
    CVE-2025-14874 (CVSS 7.5) — A flaw was found in Nodemailer. This vulnerability allows a denial of service (DoS) via a crafted email addres…
    CVE-2021-23400 (CVSS 6.3) — The package nodemailer before 6.6.1 are vulnerable to HTTP Header Injection if unsanitized user input that may…
    CVE-2020-7769 (CVSS 8.6) — This affects the package nodemailer before 6.4.16. Use of crafted recipient email addresses may result in arbi…

    References

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High